1 files changed, 50 insertions, 0 deletions
diff --git a/plugins/gme/game-music-emu-svn/gme/Dual_Resampler.h b/plugins/gme/game-music-emu-svn/gme/Dual_Resampler.h
new file mode 100644
index 00000000..e3194fe7
--- /dev/null
+++ b/plugins/gme/game-music-emu-svn/gme/Dual_Resampler.h
@@ -0,0 +1,50 @@
+// Combination of Fir_Resampler and Blip_Buffer mixing. Used by Sega FM emulators.
+
+// Game_Music_Emu 0.5.5
+#ifndef DUAL_RESAMPLER_H
+#define DUAL_RESAMPLER_H
+
+#include "Fir_Resampler.h"
+#include "Blip_Buffer.h"
+
+class Dual_Resampler {
+public:
+	Dual_Resampler();
+	virtual ~Dual_Resampler();
+	
+	typedef short dsample_t;
+	
+	double setup( double oversample, double rolloff, double gain );
+	blargg_err_t reset( int max_pairs );
+	void resize( int pairs_per_frame );
+	void clear();
+	
+	void dual_play( long count, dsample_t* out, Blip_Buffer& );
+	
+protected:
+	virtual int play_frame( blip_time_t, int pcm_count, dsample_t* pcm_out ) = 0;
+private:
+	
+	blargg_vector<dsample_t> sample_buf;
+	int sample_buf_size;
+	int oversamples_per_frame;
+	int buf_pos;
+	int resampler_size;
+	
+	Fir_Resampler<12> resampler;
+	void mix_samples( Blip_Buffer&, dsample_t* );
+	void play_frame_( Blip_Buffer&, dsample_t* );
+};
+
+inline double Dual_Resampler::setup( double oversample, double rolloff, double gain )
+{
+	return resampler.time_ratio( oversample, rolloff, gain * 0.5 );
+}
+
+inline void Dual_Resampler::clear()
+{
+	buf_pos = sample_buf_size;
+	resampler.clear();
+}
+
+#endif